  
  
  [1XReferences[101X
  
  [[20XBR08[120X] [16XBarakat, M. and Robertz, D.[116X, [17Xhomalg -- A Meta-Package for Homological
  Algebra[117X, [18XJ. Algebra Appl.[118X, [19X7[119X, 3 (2008), 299--317, ((arXiv:math.AC/0701146)).
  
  [[20XMR01[120X]  [16XMcConnell, J. C. and Robson, J. C.[116X, [17XNoncommutative Noetherian rings[117X,
  American   Mathematical   Society,  Revised  edition,  Graduate  Studies  in
  Mathematics, [19X30[119X, Providence, RI (2001), xx+636 pages, ((With the cooperation
  of L. W. Small)).
  
  
  
  [32X
